Mobile Reviews UK (Unlocking Codes):

Many GSM mobile phones are sold "locked" to a specific network or networks. Once your phone has been unlocked, you can then use it with any network, provided that you have a valid SIM card.
The easiest way to unlock your phone is by obtaining an unlock code that you can then enter into your mobile yourself. There are a number of companies offering unlock codes for mobile phones on the web, and they are quite a lot cheaper than going to your dealer or network, provided that you have a compatible phone.

Unlock codes

The way it works is like this: you need to find out the 15-digit IMEI number on your mobile (type *#06# into your phone to do this. NOTE - CODES ENTERED AT YOUR OWN RISK. WE ACCEPT NO RESPONSIBILITY FOR DAMAGE TO PHONES.) You then supply this number to the unlocking company, and they will give you a code that you can enter into your phone to unlock it. Some companies will do this by email or over the phone, which is more convenient than having to wait for the unlock code in the post.

Data cables & software for mobile unlocking

Unlock clips, cables & software
You can also buy unlock clips that generate unclock codes for mobile phones via a connecting cable. The software in the clip will automatically unlock your phone. The benefit of using an unlocking clip is that you can use it to unlock as many phones as you like!

Unlock mobile phones - compatible phones:

Unlock LG phones: (LG KG800 Chocolate, LG Prada, LG Shine, LG U300, LG U400, LG Viewty KU990)

Unlock Motorola phones: (Motorola RAZR2 V9, RAZR2 V8, W395, W380, W360, W218, RIZR Z8, KRZR K3, SLVR L9, Q 9h, Q, W510, W215, W205, ROKR Z6, ROKR E6, SLVR L7e, RAZR maxx V6, RAZR V3xx, RIZR Z3, KRZR K1, W375, W209, W208, Motofone F3, W220, V195, V191, ROKR E2, RAZR V3i, ROKR E1, A910, A1200, A728, A732, E895, V3x, E1070, E770, SLVR L7, PEBL U6, A1010, E1060, E1120, V1050, C261, C257, C168, C139, C118, C117, C113a, C113, C390, E680i, V560, V557, V361, V360, L6, L2, V235, V230, V186, V176, E378i, V635, A668, V980, C980, V535, V547, E375, RAZR V3, A780, V975, C975, V620, V555, A840, E680, E398, C650, V226, V188, V171, C155, C116, C115, MPx, MPx220, MPx100, V872, V1000, E1000, A1000, A768i, A630, C380, C385, V80, C289, C205, V400p, V220, V180, V878, A92

Unlock Nokia phones: (Nokia 5300, 5310 XpressMusic, 5610, 5700, 7900 Prism, 7500 Prism, 8600 Luna, 6500 slide, 6500 classic, 3500 classic, 2630, 6267, 2760, 2660, 1650, 1208, 1200, 6120 classic, 6121 classic, 5700, 5070, E90, E65, E61i, N77, 6110 Navigator, 3110 classic, 3109 classic, N76, N93i, 6290, 6086, 6300, 2626, N95, N75, 5300, 5200, 6288, 6085, 8800 Sirocco, 7390, 7373, 6151, 6080, 1110i, E50, 5500 Sport, N93, N73, N72, 2610, 2310, 1112, 6136, 6133, 6131, 6070, 6125, 6103, 6233, 6234, 6282, 9300i, N92, N80, N71, 7380, 7370, 7360, E70, E62, E61, E60, 3250, 6708, 6280, 6270, 6111, 6060, N91, N90, N70, 2652, 1600, 1110, 1101, 5140i, 8800, 6230i, 6021, 6030, 6680, 6681, 6101, 6822, 7710, 6020, 3230, 6670, 7280, 7270, 7260, 9300, 6630, 6260, 6170, 3128, 2650, 2600, 3220, N-Gage QD, 3120,

Unlock Samsung phones: (Samsung G600, G800, F700, P520, P260, L600, Z630, G600, S730i, S720i, L760, E950, F210, F200, i620, ZV60, Z240, Z170, J600, i400, U700, U600, U300, U100, i710, i520, F520, F510, P110, E840, E830, E740, E590, E200, C520, C450, C260, C250, F700, i600, F500, F300, P940, P930, E790, E490, E480, E390, X540, E250, X520, X530, C300, M300, E690, E570, E420, X830, E890, E898, P310, Z720, Z650i, Z620, Z370, P200, S501i, S401i, X510, X500, D840, C400, C240, C180, C170, C160, C140, D830, D900i, D900, X820, C130, E500, E380, D870, D780, E900, Z400, Z550, i320, i310, ZV50, ZV40, Z560, P920, P900, P910, D520, D300, Z710, Z600, Z520, Z350, Z230, Z330, Z310, Z150, X680, X630, X300, X210, X160, E870, E780, i300x, D820, D810, D800, Z540, Z510, P300, E770, E370, E360, ZV30, ZV10, Z320i, S400i, S500i, E860, Serene, D600, P850, E730, D510, X700, X670, X660, X490, X650, X200, X150, Z500, Z300, Z130, Z140, D550, P860, Z700, D730, i750, D720, E760, E750, E720, i300, E880, E350, E640, E620, E530, E340, X810, X800, C120, C23

Unlock Siemens phones: (Siemens AL21, A31, AF51, ME75, AP75, AX72, SG75, SFG75, CC75, CF110, C72, S75, SL75, C75, SP65, SXG75, M75, CX75, CF75, CL75, AX75, A75, A70, SF65, CX Emoty, CX70, SX66, SK65, A65, A62, A51, SL65, CFX65, S65, M65, C65, CXT65, CX65, CF62, A57, ST60, CL55, Xelibri 8, Xelibri 7, Xelibri 6, Xelibri 5, U15, C62, A60, SX1, ST55, MC60, C60, Xelibri

Unlock Sony Ericsson phones: (Sony Ericsson K770i, K850i, W960i, W910i, K530i, Z320i, Z250i, P1i, T650i, S500i, T250i, Z750i, W580i, W660i, W880i, K810i, W610i, K550i, K220i, K200i, J120i, J110i, K550im, W888, W200i, Z310i, W830i, K320i, Z558i, Z610i, K618i, W850i, W710i, Z710i, Z550i, W700i, Z525i, K800i, K790i, V630i, W300i, Z530i, P990i, K510i, K310i, W950i, M600i,